PHP is not working in apache 2.2.6

I am new to this community and also new to PHP. My problem is that i have installed apache 2.2.6 and also have php 5.2 version. also made all the changes in conf file of apache. I also did all the neccesary things on PHP side (placing & changing files in windows folder) . my apache webserver is running fine and when i am calling a .php page it is not showing any output (giving me standard error) .can any one help me up to configure this properly
i followed all the steps(nice article) for configuring php and apache 2.2.6 from differnet threads :http://www.reaper-x.com/2007/09/24/installing-and-setting-up-apache-22-series-with-php-5-on-windows/
but still i am facing this problem can any one help me on a quick note.